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81 lines
2.1 KiB
JavaScript
81 lines
2.1 KiB
JavaScript
// Copyright (C) 2016 The V8 Project authors. All rights reserved.
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// This code is governed by the BSD license found in the LICENSE file.
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/*---
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esid: sec-isfinite-number
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description: >
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Use non-object value returned from @@toPrimitive method
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info: |
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isFinite (number)
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1. Let num be ? ToNumber(number).
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ToPrimitive ( input [ , PreferredType ] )
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[...]
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4. Let exoticToPrim be ? GetMethod(input, @@toPrimitive).
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5. If exoticToPrim is not undefined, then
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a. Let result be ? Call(exoticToPrim, input, « hint »).
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b. If Type(result) is not Object, return result.
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features: [Symbol.toPrimitive]
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---*/
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var called = 0;
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var obj = {
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valueOf: function() {
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called = NaN;
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return Infinity;
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},
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toString: function() {
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called = NaN;
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return Infinity;
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}
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};
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obj[Symbol.toPrimitive] = function() {
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called += 1;
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return 42;
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};
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assert.sameValue(isFinite(obj), true, "use returned value - number");
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assert.sameValue(called, 1, "toPrimitive is called - number");
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called = 0;
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obj[Symbol.toPrimitive] = function() {
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called += 1;
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return "42";
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};
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assert.sameValue(isFinite(obj), true, "use returned value - string");
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assert.sameValue(called, 1, "toPrimitive is called - string");
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called = 0;
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obj[Symbol.toPrimitive] = function() {
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called += 1;
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return true;
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};
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assert.sameValue(isFinite(obj), true, "use returned value - boolean true");
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assert.sameValue(called, 1, "toPrimitive is called - boolean true");
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called = 0;
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obj[Symbol.toPrimitive] = function() {
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called += 1;
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return false;
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};
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assert.sameValue(isFinite(obj), true, "use returned value - boolean false");
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assert.sameValue(called, 1, "toPrimitive is called - boolean false");
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called = 0;
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obj[Symbol.toPrimitive] = function() {
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called += 1;
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return Infinity;
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};
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assert.sameValue(isFinite(obj), false, "use returned value - Infinity");
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assert.sameValue(called, 1, "toPrimitive is called - Infinity");
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called = 0;
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obj[Symbol.toPrimitive] = function() {
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called += 1;
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return -Infinity;
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};
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assert.sameValue(isFinite(obj), false, "use returned value - -Infinity");
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assert.sameValue(called, 1, "toPrimitive is called - -Infinity");
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